US 12,136,729 B2
Sulfur-carbon composite manufacturing method, sulfur-carbon composite manufactured thereby, cathode comprising same sulfur-carbon composite, and lithium secondary battery comprising same cathode
Eunkyung Cho, Daejeon (KR); and Kwonnam Sohn, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed on Jul. 11, 2023, as Appl. No. 18/350,244.
Application 17/745,047 is a division of application No. 17/041,989, granted, now 11,362,325, issued on Jun. 14, 2022, previously published as PCT/KR2019/011956, filed on Sep. 17, 2019.
Application 18/350,244 is a continuation of application No. 17/745,047, filed on May 16, 2022, granted, now 11,757,091.
Claims priority of application No. 10-2018-0111953 (KR), filed on Sep. 19, 2018.
Prior Publication US 2023/0361276 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/36 (2006.01); H01B 1/04 (2006.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01B 1/04 (2013.01); H01M 4/38 (2013.01); H01M 4/587 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A sulfur-carbon composite, wherein the sulfur is coated on the surface of carbon nanotube particles uniformly by melt diffusion process of a sulfur,
wherein the sulfur-carbon composite is prepared by a method comprising the steps of:
(a) mixing carbon nanotube particles with sulfur particles or sulfur compound particles to prepare a sulfur-carbon mixture;
(b) placing the sulfur-carbon mixture mixed in step (a) and a vaporizable liquid into a sealable container; and
(c) heating the sealed container to a temperature of 120 to 200° C. to vaporize the vaporizable liquid and provide a reaction atmosphere comprising the vaporizable liquid during the melting process of sulfur and form the sulfur-carbon composite,
wherein the sulfur-carbon composite consists of (i) carbon and (ii) sulfur and/or a sulfur compound, and
wherein the vaporizable liquid in step (c) is present in an amount of 10 parts by weight to 300 parts by weight based on 100 parts by weight of the sulfur-carbon mixture.